Improvement in windmills



Q 2Sheets--Sheet1. E. 8. S MITH.

1 Wind-Mills. N0.l50,489. Patentpd May 5,1874.

7131116356 v v 1 )mm Inventor I g k/fla W W ta /{L 5 for that purpose.

rrcn.

EIIIJAH s. SMITH, or soon HOPE, ILLINOIS.

IMPROVEMENT IN WINDMILLS.

Specification forming part of Letters Patent No. 150,489, dated May 5,1874; application filed April 10, 1874.

To all whom it may concern:

Be it known that I, E. S. SMITH, of Good Hope, in the county ofMcDonough and State of Illinois, have invented a new and usefulImprovement in Windmills; and I do hereby declare that the following isa full and exact description of the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon.

This invention is a windmill which, by its peculiar construction andattachments, folds up when subjected to a strong force of wind; and itsnovelty consists, first, in the arms acting independently of each otheron the main shaft at the center of the wheel; second, in auX'iliarysails attached at each end at. the rear of the rear arm; third, in thecombination of a brake -'wheel and its attachments with auxiliary sailsand independent foldingarms.

In the drawing, Figure 1 represents a front elevation, showing the wheelspread out full size. Fig. 2 is a side elevation, showing the wheelfolded up.

To enable others skilled in the art to make and use my invention, I willnow proceed to describe fully its construction.

9 g g 9 represent the arms of the wheel, to which are attached the sailsF F F F. At the center of the arms 9 g g gI make a'hole sufficientlylarge, so that thearms will fit on the shaft loosely, except the frontarm, which is attached firmly to the shaft 0 by means of the flange J,which is provided with a set'screw At the rear of the rear arm thebrake-wheel H is firmly. attached. i i I 6 represent leather straps,which only allow the wheel to spread out to its full size, as shown inFig. 1. A represents an auxiliary sail, attached by hinges to the reararm back of the rear sail, which is held down, when not in motion, by aspiral spring, 8. (t represents the brake. n represents the rod, whichis attached to the en (1 of the brake-lever, as shown in dotted lines,Fig. 2.

The operation is as follows: The wheel, as shown, is mounted, in theusual manner, on an upright standard, the upper end being rounded,forming a spindle, on which the box that supports the wheel proper isplaced, as shown at d d, Fig. 2, which allows the wheel to turn, by

means of the tail-board, in any direction that the wind may be blowing.When the wheel commences to revolve, and power applied to thecrank-shaft 0, the front arm, being secured firmly to the shaft, isretarded in its motion. The other arms, being loosely attached to theshaft, are not retarded in their motion until they spread out to thefull size of the wheel shown in Fig. 1, and, by the means of the leatherstraps i i i, the power is all connected to and applied to the frontarm, giving all the power to the crank-shaft 0, causing it to performsuch labor as may be required.

In strong winds and wind-storms the speed of the wheel is governed bythe. auxiliary sail A, which, only being slightly held by the spiralspring 8, opens out (shown in dotted lines) when the wheel is in a highmotion, so as to form a plane at right angles with the sail proper,which will retard the motion sufficiently to keep the wheel'folded up,but not sufficient to stop the wheel. If the wheel is wanted to have avery slow motion the brake a is applied to the wheel H by means of therod 12, at the lower end of which can be at tached a weight sufficientto stop the motion entirely, if desired, when there is no labor wanted;or theweight can be of such substance as to float in a well, and actautomatically, allowing the wheel only to pump such quantity of water asmay be required.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A wind-wheel, as shown, with independent arms 9 g g g, that will foldup, substantially as and for the purpose set forth.

2. The auxiliary sails A and springs s, as described, for the purposeset forth.

3. The brake-wheelI-I and auxiliarysails A, in combination with afolding wind-wheel, operating substantially as and for the purpose setforth.

' ELIJAH S. SMITH.

IVitnesses THos. J. PRICE, DAVID BLAZER.

